Vulnerability Report

CVE-2026-33376

Title: Grafana Auth Proxy IPv6 Allow-list Bypass

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-33376.

CWE Category NVD-CWE-noinfo

Published Date May 13, 2026

Modified Date Jun 02, 2026

Exploit Status Not Found

Score 7.4 CVSS v3.1

Exploit Probability (EPSS)

0.27%

Vulnerability Summary

CVE-2026-33376: When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML, LDAP, etc are unaffected here.

Impacted Vendors

grafana 1

Reference Links

https://grafana.com/security/security-advisories/cve-2026-33376

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.4

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-33376 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 02, 2026 MODIFIED

Vulnerability data updated via NVD.

May 14, 2026 MODIFIED

Vulnerability data updated via NVD.

May 14, 2026 MODIFIED

Vulnerability data updated via NVD.

May 13, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Stack

No specific products linked.